JPS55115839A - Recovery of formaldehyde - Google Patents
Recovery of formaldehydeInfo
- Publication number
- JPS55115839A JPS55115839A JP2425079A JP2425079A JPS55115839A JP S55115839 A JPS55115839 A JP S55115839A JP 2425079 A JP2425079 A JP 2425079A JP 2425079 A JP2425079 A JP 2425079A JP S55115839 A JPS55115839 A JP S55115839A
- Authority
- JP
- Japan
- Prior art keywords
- formaldehyde
- cellulose
- heating
- recover
- recovery
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Landscapes
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Abstract
PURPOSE: To recover formaldehyde (H) effectively, by heating H in stripping step between the dissolving and regeneration of cellulose under specific conditions.
CONSTITUTION: A cellulose solution, obtained by heating cellulose, dimethyl sulfoxide, and excess low-polymerization degree polyoxymethylene (P), is heated at 115W135°C, preferably 120W130°C, for 0.5W5hr to strip and recover formaldehyde within the range below the amount of P and formaldehyde formed through decomposition of P of 0.2pts.wt. per unit weight of the cellulose.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2425079A JPS55115839A (en) | 1979-03-01 | 1979-03-01 | Recovery of formaldehyde |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2425079A JPS55115839A (en) | 1979-03-01 | 1979-03-01 | Recovery of formaldehyde |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS55115839A true JPS55115839A (en) | 1980-09-06 |
Family
ID=12132990
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2425079A Pending JPS55115839A (en) | 1979-03-01 | 1979-03-01 | Recovery of formaldehyde |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS55115839A (en) |
-
1979
- 1979-03-01 JP JP2425079A patent/JPS55115839A/en active Pending
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